Sakae/Ringyo (SR) XCM
Main Photo
Category:  Cranksets
Name:  Sakae/Ringyo (SR) XCM
Brand:  Sakae/Ringyo (SR)
Model:  XCM
Years:  Late 1980's
Country:  Japan
Added By: JFischer on 02/22/08
Updated By: JFischer on 01/29/09
Additional Photos - click for full size
Sakae/Ringyo (SR) XCMSakae/Ringyo (SR) XCMSakae/Ringyo (SR) XCM
 Verify Component Photos
Chainring CountTripleBCD 110mm
BB StyleSquare Taper (JIS)Pedal Threads9/16" x 20 (English)
BB Length Flutes None
Lengths 170Arm/Spider MaterialAluminum Alloy
Front MarkingsXCMBack Markings
Extractor Threading 22x1mm (Standard)  
General Information

Appears to be the same crank as the SunTour Edge, probably made by Sakae for SunTour.  BCD: 110 & 74

Photos supplied by: paddythepeddler

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Additional Resources
Resources:Reference & ChartsCatalogsGear Calculator
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
SunTour CW-ED45, EdgeSunTourEdge
Brand Information(click to expand)
Date of Manufacturing / Production Code for SR seatposts (at least for the 80's):
The date of prodcution of SR (Laprade) seatposts is shown around the min.insert line as follows:
"letter"-"double digit number", e.g. F-81 oder L-81, while the letter should be the month and the number will be the year of production.
So F-81 seems to be June 1981 while L-81 would indicate December 1981.
(in-line with the code 1 examples on

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